Java 将文本设置为自定义对话框类

我试图建立一个自定义对话框，动态设置文本。下面是我的代码，它抛出了一个

NullPointerException

更新代码

  listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            HomeItem homeItem = (HomeItem) adapter.getItem(position);
            final Dialog dialog = new Dialog(databaseFightCard.this, android.R.style.Theme_Black_NoTitleBar_Fullscreen);
            WindowManager.LayoutParams lp = (dialog.getWindow().getAttributes());
            lp.dimAmount = 0.5f;
            dialog.getWindow().addFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND);

            Window window = dialog.getWindow();
            window.setGravity(Gravity.CENTER);

            dialog.setContentView(R.layout.custom_dialog);

            LayoutInflater inflater = (LayoutInflater) databaseFightCard.this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
           RelativeLayout relative = (RelativeLayout) inflater.inflate(R.layout.custom_dialog, null, false);

            Button play = (Button) findViewById(R.id.bPlay);
            Button done = (Button) findViewById(R.id.bDone);
            TextView rn = (TextView) findViewById(R.id.tvRName);
            TextView ra = (TextView) findViewById(R.id.tvRAge);
            TextView rr = (TextView) findViewById(R.id.tvRRecord);
            TextView rh = (TextView) findViewById(R.id.tvRHeight);
            TextView rw = (TextView) findViewById(R.id.tvRWeight);
            TextView rc = (TextView) findViewById(R.id.tvRCity);
            TextView re = (TextView) findViewById(R.id.tvRExp);
            TextView bn = (TextView) findViewById(R.id.tvBName);
            TextView ba = (TextView) findViewById(R.id.tvBAge);
            TextView br = (TextView) findViewById(R.id.tvBRecord);
            TextView bh = (TextView) findViewById(R.id.tvBHeight);
            TextView bw = (TextView) findViewById(R.id.tvBWeight);
            TextView bc = (TextView) findViewById(R.id.tvBCity);
            TextView be = (TextView) findViewById(R.id.tvBExp);


            rn.setText(homeItem.getHomeItemRedName()+"");
            ra.setText(homeItem.getHomeItemRedAge()+"");
            rr.setText(homeItem.getHomeItemRedRecord()+"");
            rh.setText(homeItem.getHomeItemRedHeight()+"");
            rw.setText(homeItem.getHomeItemRedWeight()+"");
            rc.setText(homeItem.getHomeItemRedCity()+"");
            re.setText(homeItem.getHomeItemRedExp()+"");
            bn.setText(homeItem.getHomeItemBlueName()+"");
            ba.setText(homeItem.getHomeItemBlueAge()+"");
            br.setText(homeItem.getHomeItemBlueRecord()+"");
            bh.setText(homeItem.getHomeItemBlueHeight()+"");
            bw.setText(homeItem.getHomeItemBlueWeight()+"");
            bc.setText(homeItem.getHomeItemBlueCity()+"");
            be.setText(homeItem.getHomeItemBlueExp()+"");
            dialog.setContentView(relative);

            play.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    //add the play intent here
                    dialog.dismiss();
                }
            });

            done.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    dialog.dismiss();
                }
            });
                dialog.show();

        }
    });

---

请解释如何将文本设置为对话框。

在尝试查找文本视图之前，请先尝试显示对话框，如put Dialog.show。或者先将视图充气，然后将视图传递给对话框。你现在要做的是在它膨胀之前找到它

编辑：要使用充气机，请尝试以下操作：

   LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

   RelativeLayout view = (RelativeLayout)inflater.inflate(R.layout.custom_dialog, null, false);

   TextView rn = (TextView) view.findViewById(R.id.tvRName);

   dialog.setContentView(view);

编辑2：

    listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        HomeItem homeItem = (HomeItem) adapter.getItem(position);
        final Dialog dialog = new Dialog(databaseFightCard.this, android.R.style.Theme_Black_NoTitleBar_Fullscreen);
        WindowManager.LayoutParams lp = (dialog.getWindow().getAttributes());
        lp.dimAmount = 0.5f;
        dialog.getWindow().addFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND);

        Window window = dialog.getWindow();
        window.setGravity(Gravity.CENTER);

        LayoutInflater inflater = (LayoutInflater) databaseFightCard.this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
       RelativeLayout relative = (RelativeLayout) inflater.inflate(R.layout.custom_dialog, null, false);

        dialog.setContentView(relative);

        Button play = (Button) relative.findViewById(R.id.bPlay);
        Button done = (Button) relative.findViewById(R.id.bDone);
        TextView rn = (TextView) relative.findViewById(R.id.tvRName);
        TextView ra = (TextView) relative.findViewById(R.id.tvRAge);
        TextView rr = (TextView) relative.findViewById(R.id.tvRRecord);
        TextView rh = (TextView) relative.findViewById(R.id.tvRHeight);
        TextView rw = (TextView) relative.findViewById(R.id.tvRWeight);
        TextView rc = (TextView) relative.findViewById(R.id.tvRCity);
        TextView re = (TextView) relative.findViewById(R.id.tvRExp);
        TextView bn = (TextView) relative.findViewById(R.id.tvBName);
        TextView ba = (TextView) relative.findViewById(R.id.tvBAge);
        TextView br = (TextView) relative.findViewById(R.id.tvBRecord);
        TextView bh = (TextView) relative.findViewById(R.id.tvBHeight);
        TextView bw = (TextView) relative.findViewById(R.id.tvBWeight);
        TextView bc = (TextView) relative.findViewById(R.id.tvBCity);
        TextView be = (TextView) relative.findViewById(R.id.tvBExp);


        rn.setText(homeItem.getHomeItemRedName()+"");
        ra.setText(homeItem.getHomeItemRedAge()+"");
        rr.setText(homeItem.getHomeItemRedRecord()+"");
        rh.setText(homeItem.getHomeItemRedHeight()+"");
        rw.setText(homeItem.getHomeItemRedWeight()+"");
        rc.setText(homeItem.getHomeItemRedCity()+"");
        re.setText(homeItem.getHomeItemRedExp()+"");
        bn.setText(homeItem.getHomeItemBlueName()+"");
        ba.setText(homeItem.getHomeItemBlueAge()+"");
        br.setText(homeItem.getHomeItemBlueRecord()+"");
        bh.setText(homeItem.getHomeItemBlueHeight()+"");
        bw.setText(homeItem.getHomeItemBlueWeight()+"");
        bc.setText(homeItem.getHomeItemBlueCity()+"");
        be.setText(homeItem.getHomeItemBlueExp()+"");
        dialog.setContentView(relative);

        play.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                //add the play intent here
                dialog.dismiss();
            }
        });

        done.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                dialog.dismiss();
            }
        });
            dialog.show();

    }
});

listView.setOnItemClickListener（新的AdapterView.OnItemClickListener（）{
@凌驾
public void onItemClick（AdapterView父对象、视图、整型位置、长id）{
HomeItem HomeItem=（HomeItem）适配器.getItem（位置）；
最终对话框=新建对话框（databaseFightCard.this，android.R.style.Theme\u Black\u NoTitleBar\u全屏）；
WindowManager.LayoutParams lp=（dialog.getWindow（）.getAttributes（））；
lp.dimAmount=0.5f；
dialog.getWindow（）.addFlags（WindowManager.LayoutParams.FLAG\u DIM\u BEHIND）；
Window=dialog.getWindow（）；
设置重力（重心）；
LayoutFlater充气器=（LayoutFlater）数据库FightCard.this.getSystemService（Context.LAYOUT\u充气器\u服务）；
RelativeLayout relative=（RelativeLayout）充气器。充气（R.layout.custom_对话框，null，false）；
setContentView（相对）；
按钮播放=（按钮）相对.findViewById（R.id.bPlay）；
Button done=（Button）relative.findViewById（R.id.bDone）；
TextView rn=（TextView）relative.findViewById（R.id.tvRName）；
TextView ra=（TextView）relative.findviewbyd（R.id.tvRAge）；
TextView rr=（TextView）relative.findViewById（R.id.tvRRecord）；
TextView rh=（TextView）relative.findViewById（R.id.tvRHeight）；
TextView rw=（TextView）relative.findviewbyd（R.id.tvRWeight）；
TextView rc=（TextView）relative.findviewbyd（R.id.tvRCity）；
TextView re=（TextView）relative.findviewbyd（R.id.tvrepp）；
TextView bn=（TextView）relative.findviewbyd（R.id.tvBName）；
TextView ba=（TextView）relative.findviewbyd（R.id.tvBAge）；
TextView br=（TextView）relative.findviewbyd（R.id.tvBRecord）；
TextView bh=（TextView）relative.findViewById（R.id.tvBHeight）；
TextView bw=（TextView）relative.findViewById（R.id.tvBWeight）；
TextView bc=（TextView）relative.findViewById（R.id.tvBCity）；
TextView be=（TextView）relative.findviewbyd（R.id.tvBExp）；
rn.setText（homeItem.getHomeItemRedName（）+）；
ra.setText（homeItem.getHomeItemRedAge（）+）；
rr.setText（homeItem.getHomeItemRedRecord（）+）；
右侧.setText（homeItem.getHomeItemRedHeight（）+）；
rw.setText（homeItem.getHomeItemRedWeight（）+）；
rc.setText（homeItem.getHomeItemRedCity（）+）；
re.setText（homeItem.getHomeItemRedExp（）+）；
bn.setText（homeItem.getHomeItemBlueName（）+）；
ba.setText（homeItem.getHomeItemBlueAge（）+）；
br.setText（homeItem.getHomeItemBlueRecord（）+）；
bh.setText（homeItem.getHomeItemBlueHeight（）+）；
setText（homeItem.getHomeItemBlueWeight（）+）；
bc.setText（homeItem.getHomeItemBlueCity（）+）；
be.setText（homeItem.getHomeItemBlueExp（）+）；
setContentView（相对）；
play.setOnClickListener（新视图.OnClickListener（）{
@凌驾
公共void onClick（视图）{
//在这里添加游戏意图
dialog.dismise（）；
}
});
done.setOnClickListener（新视图.OnClickListener（）{
@凌驾
公共void onClick（视图）{
dialog.dismise（）；
}
});
dialog.show（）；
}
});

我已尝试将.show（）放在第一位。我不知道怎么做你说的另一件事。什么时候是设置文本的最佳时间？在

dialog.setContentView（视图）之前或之后设置文本时无所谓，只要布局已膨胀。您的代码将产生以下错误：
java.lang.ClassCastException:android.widget.RelativeLayout无法转换为android.widget.FrameLayout
抱歉，我已更新编辑。我假设你的根布局是一个框架布局，但它是一个相对的布局。
    listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        HomeItem homeItem = (HomeItem) adapter.getItem(position);
        final Dialog dialog = new Dialog(databaseFightCard.this, android.R.style.Theme_Black_NoTitleBar_Fullscreen);
        WindowManager.LayoutParams lp = (dialog.getWindow().getAttributes());
        lp.dimAmount = 0.5f;
        dialog.getWindow().addFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND);

        Window window = dialog.getWindow();
        window.setGravity(Gravity.CENTER);

        LayoutInflater inflater = (LayoutInflater) databaseFightCard.this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
       RelativeLayout relative = (RelativeLayout) inflater.inflate(R.layout.custom_dialog, null, false);

        dialog.setContentView(relative);

        Button play = (Button) relative.findViewById(R.id.bPlay);
        Button done = (Button) relative.findViewById(R.id.bDone);
        TextView rn = (TextView) relative.findViewById(R.id.tvRName);
        TextView ra = (TextView) relative.findViewById(R.id.tvRAge);
        TextView rr = (TextView) relative.findViewById(R.id.tvRRecord);
        TextView rh = (TextView) relative.findViewById(R.id.tvRHeight);
        TextView rw = (TextView) relative.findViewById(R.id.tvRWeight);
        TextView rc = (TextView) relative.findViewById(R.id.tvRCity);
        TextView re = (TextView) relative.findViewById(R.id.tvRExp);
        TextView bn = (TextView) relative.findViewById(R.id.tvBName);
        TextView ba = (TextView) relative.findViewById(R.id.tvBAge);
        TextView br = (TextView) relative.findViewById(R.id.tvBRecord);
        TextView bh = (TextView) relative.findViewById(R.id.tvBHeight);
        TextView bw = (TextView) relative.findViewById(R.id.tvBWeight);
        TextView bc = (TextView) relative.findViewById(R.id.tvBCity);
        TextView be = (TextView) relative.findViewById(R.id.tvBExp);


        rn.setText(homeItem.getHomeItemRedName()+"");
        ra.setText(homeItem.getHomeItemRedAge()+"");
        rr.setText(homeItem.getHomeItemRedRecord()+"");
        rh.setText(homeItem.getHomeItemRedHeight()+"");
        rw.setText(homeItem.getHomeItemRedWeight()+"");
        rc.setText(homeItem.getHomeItemRedCity()+"");
        re.setText(homeItem.getHomeItemRedExp()+"");
        bn.setText(homeItem.getHomeItemBlueName()+"");
        ba.setText(homeItem.getHomeItemBlueAge()+"");
        br.setText(homeItem.getHomeItemBlueRecord()+"");
        bh.setText(homeItem.getHomeItemBlueHeight()+"");
        bw.setText(homeItem.getHomeItemBlueWeight()+"");
        bc.setText(homeItem.getHomeItemBlueCity()+"");
        be.setText(homeItem.getHomeItemBlueExp()+"");
        dialog.setContentView(relative);

        play.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                //add the play intent here
                dialog.dismiss();
            }
        });

        done.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                dialog.dismiss();
            }
        });
            dialog.show();

    }
});